Car roof



' April 7, 1925.

C. D. BQNSALLl CAR aoov Filed April 30, 1924 I/VVEN'TORI Patented Apr. 7, 1925.

UNITED STATES CHARLES DAVID BONSALL, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO I. H. MURPHY COMPANY, OF NEW KENSINGTON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CAR ROOF.

To all whom it may concern:

Be it known that I, CHARLES DAVID BoN- SALL, a citizen of the United States, and a resident of the city of Pittsburgh, in the county of Allegheny and State of Pennsyl vania, have invented a certain new and useful Improvement in Car Roofs, of which the following isa specification.

This invention relates to car roofs of the all-steel riveted-up type wherein self sup-- porting roof sheets extendfrom side plate to side plate of the car and are formed along their side margins with raised portions that are rigidly secured together to form hollow weather proofing seams or joints that serve as ventilating fiues and function as carlines. One of the principal objects of thepresent invention is to increase the strength and rigidity of the roof'by improving the sectional shape and arrangement of the lapped portions of adjacent sheets.v 1 Another object is to utilize the scams or joints as ventilating flues. Another object is to prevent water that may enter the seams or joints from reaching the interior of the car. Other objects are to simplify the construction of the roof and'to cheapen the cost thereof.

The invention consists principally inshaping and arranging the cooperating marginal portions of the roof sheets to form hollow weather proofing seams or joints that are better fitted for taking care of contemplated stresses; it also consists in strengthening said joints by means of a member that-serves as a drain channel for carrying off any water that may enter said joints; and it also consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification, and wherein,

like symbols refer to like parts wherever they occur.

Fig. 1 is a plan View of a portionof the car roof comprising my invention,

Fig 2 is an enlarged transverse section through one-half of the car roof on the line 22 in Fig. 1, V

Fig. 3 is a cross section through one of the hollow seams at the ridge on the line 3-3 in Fig. 1,

Fig. 4 is a similar section taken midway of the ridge and eaves on the line 414.- in Fig. 1, v

Fig. 5 is a similar section taken at the side plate on the line 5-5 in Fig. 1, and

Fig. 6 is a cross section through the eaves portion of the roof, the section being taken through one of the hollow seams on the line 2 2 in Fig. 1. I

The roof shown in the accompanying drawing comprises metallic roof sheets '7 that extend transversely of the car vfrom eaves to eaves thereof with their side margins overlapping. The roof sheets slope form hollow weather proofing seams or.

joints A that extend from side to side of the car and function as carlines to increase the load carrying capacityof the roof and to brace and stiffen the car body. The eaves ends portions of the hollow seams A are turned down over the side plate and their ends left open. The downwardly opening eaves ends of the hollow seams A permit ventilation of the car while preventing rain from entering the same.

As shown in the accompanying drawing, the hollow ribs or carlines A are of uniform width from eaves to eaves and have a maximum depth at the ridge and gradually decrease in depthtowards the eaves where they are turned down over the side plates to form the ventilating flues. The hollow,

seams A are of substantially inverted channel-shaped section at the ridge; and on opposite sides of the ridge each seam is provided at its top with a channelB which has a depth at the eaves ends of the sheet corresponding to the depth of said seam and gradually decreases in depth to the ridge where it merges into the plane of'the top of said seam. Thus, the hollow seams A gradually change from a single inverted.

channel section at the ridge to a section atthe eaves comprising two low and narrow inverted channels C that'are separa-ted'by the upwardly opening channel B. The inverted channels C, together with the up wardly opening channels B, are turned down over the side plate and thus form double Ventilating fiues at each end of the seam.

The side marginal portion of each roof sheet 7 is raised above the body oi'thc sheet in the form of a seam flange of uniform -wi-dtl1[wliicl1 changes from a high inverted ,L-shaped section at the ridge to a low in- 3 metal whichfis utilized ingradual thefbody ofthe sheet. sheetbeing pressed il roin a sheet blank uniform width, the gradually. decreasing depth of the web portion 11 of each seani verted channel-shaped section at the eaves whose outer Wall 18 provided with a later ally extending vbase flange: located substantially in the plane of, the body of the, sheet that is said pressed up marginal portion has a nearly vertical web portion 11 at the top of which is an outwardly projecting flange 12 whose outer portion 13 is depressed or offset downwardly on each side of the ridge an ainonntior distance that gradually increases towards the eares where the downwardly ofiset flange 13 lies in the plane of By reason of the top of the seam flange and reaches the plane of the body of the sheet adjacent to the eaves ends thereof. V p The sheets are assembled by lapping the V depressed outer marginal portions 13 oftho 7 seam flanges of adjacent sheets. The lapped depressed marginal portions are then rigidly secured together by rows of rivets 15. When thus assembled, the lapped seam 1 v flanges cooperate to forin the hollow seams each side thereof.

* these members orjoints A, which gradually change, from an inverted channel-shaped section at the ridge to a section at the eaves comprising the central upwardly opening channel B. having the inverted channels C located on The hollow seams A are also provided with combinedstrengthening members and dra n channels uniform width and comprises a widefand flatsection at the. ridge which gradually changesto a narrow channel-shaped section atthe eaves.

trough "members are located within the inverted channels C and increase in depth from. ridge fto eayesan amount correspond or conductors 16. Eachoi is pressed from a sheet ,of

V The upstanding side flanges -17 of the combined strengthening, and

members 16 rest on and'are rigidlysecured to the tops of the side plates 8 by means of the endrnost rivets intherow of rivet-s15.

that rigidlysecnre the lapped seain flanges together. The members 16 slopeupwardly fr'oin ridge t ceaves atan angle corresponding to the slope ofthc depressed.marginal portions of the lapped seani flanges and are secures flatwise to said depressed marginal flanges by means 01". the rivets 15 that secure said fie: gestogethcr. ,lt not-ed thatthe members 16 serve to increase the strength and rigidity of the joints and'serve also drain troughs for carrying away any water that may enter. the joints oftherseains It is also noted that the 865111101 oint con sir ction produced by the cooperating seam flanges of adjacent 'Sl'lGBlJSiLCCOHIDllSlI the various functions ofthefcarline. The sectional shape of the sean'is'at the ridge serves toftalre care of the vertical roof loafcl and the cross sectional shape of the seams at the eaves serves to take care-of the stresses that tend to raclrandtWist the car bodyiand distort it endwise} "Thisvincreased strength and rigidity of the seains enables a roofito be produced thatzwill-be stiiierand stronger than. previous roofs ofthe same; weight oi metal. It is also noted thatthesearn 'construction provides a trough for carrying away any water that inayenter the joints of the seams by reasonof improper riveting or detective sheets."

Theinvention is notliinite-d to the precise 1 shapesand arrangeinents ot parts shown and ClOSCI'lbBd. I a i l i v What I claim. 1s;

1. Acar roof comprising metal rooilsheets having upwardly offset side marginal per tions that are lapped for a portion of their width and positively secured together to, form hollow upstanding seams whose cross sectional shape changes from inverted channel section at the'ridgeinto a section at the eaves comprising two inverted channels that are separated by an upwardly opening.

channel of a width corresponding substantially to that of the sheet lap.

2. h car roof comprising roof sheets extendingst'rorn eavesto eaves and having their ad jacent side marginal portion shaped and positively secured together to fornr hollow upstanding seams whose cross sectional shape changes from an inverted channel atv the ridge into two horizontally spaced-insertedchannels at the eaves that areturned down being lapped and positively secured together;

to form hollow upstanding weather proofing seams, each of said seams having a channel formed in its top that extends longitudinally thereof, the extent of the sheet lap being less than the width of the seams.

4:. A car roof comprising metal roof sheets extending from eaves to caves of the car; the side marginal portions otadjacent sheets being lapped and positively secured together to form hollow upstanding weather proofingseams that are turned down at the eaves and left open to provide for ventila tion, each vof said seams having a'channel. formed in its top that extends longitudinall; thereof, the width of said channel corresponding substantially to the width of the sheet lap.

5. A car roof comprising metal roof sheets extending from eaves to eaves of the car, the side marginal portions of adjacent sheets being lapped and positively secured together to form hollow upstanding weather proofing seams, each of said seams having a channel formed in its top that extends longitudinally thereof and increases in depth from ridge to eaves, the width of said channel corresponding substantially to the Width of the sheet lap.

6. A car roof comprising metal roof sheets extending from eaves to eaves of the car,the side marginal portions of adjacent sheets being lapped and positively secured together to form hollow upstanding weather proofing seams, each of said seams having a channel formed in its top that extends longitudinally thereof and increases in depth from ridge to eaves, and a stiffening member located in said hollow seams, said stiffening member being of greater width than the Width of the sheet lap and being secured to the car at the caves and to the seam at points intermediate the eaves.

7. A car roof comprising metal roof sheets extending from caves to caves of the car, the side marginal portions of adjacent sheets being lapped and positively secured together to form hollow upstanding weather proofing seams, each of said seams having a channel formed in its top that extends longitudinally thereof and increases in depth from ridge to eaves where its depth corresponds substantially to the depth of said seam, the width of said channel corresponding substantially to the width of the sheet lap.

8. A car roof comprising roof sheets hav ing their adjacent side marginal portions offset upwardly, the upwardly offset side marginal portions of adjacent sheets being lapped for a portion of their width and 'posi tively secured together to form hollow upstanding seams, the lapped portions of adjacent sheets being less than the width of the seam and being offset downwardly to form channels in said seams that extend longitudinally thereof.

- '9. A ear roof comprising roof sheets extending from eaves to eaves and havingtheir adjacent side marginal portions offset upwardly, the upwardly offsetside marginal portions of adjacent sheets being lapped for a portion of their width and positively se cured together to form hollow upstanding seams that extend from caves to eaves of the car, the lapped portions of adjacent sheets being less than the width of the seam and being offset downwardly on opposite sides ofthe ridge to form channels in said seams that extend longitudinally thereof.

10. A car roof comprising roof sheets extending from eaves to caves and having their adjacent side marginal portions offset upwardly, the upwardly offset side marginal portions of adjacent sheets being lapped for a portion of their Width and positively secured together to form hollow upstanding seams thatextend fromea-ves to eaves of the car, the lapped portions of adjacent sheets being less. than the width of the seam and being offset downwardly on opposite sides of the ridge to form channels in said seams that extend longitudinally thereof, said channels increasing in'depth from ridge to eaves.

11. A car roof comprising roof sheets extending from eaves to eaves and having their adjacent side marginal portionsoffset upwardly, the upwardly offset side marginal portions of adjacent sheets being lapped for a portion of their width and positively secured together to form hollow upstanding seams that extend from eaves to eaves of the car, the lapped portions of adjacent sheets being less than the width of the seam and being offset downwardly on opposite sides .of the ridge to form channels in said seams that extend longitudinally thereof, said seams decreasing in depth from ridge to eaves and said channels increasing in depth from ridge to eaves.

12. A car roof comprising roof sheets extending from eaves to eaves and having their adjacent side marginal portions offset upwardly, the upwardly offset side marginal portions of adjacent sheets being lappedfor a portion of their width and positively secured together to form hollow upstanding seams that extend from eaves to eaves of the car, the lapped portions of adjacent sheets being offset downwardly on opposite sides of the ridge to form channels insaid seams that extend longitudinally thereof, and a member located in said seam and extending longitudinally thereof-Q said member being positively securedto the downwardly offset lapped portions of the sheets and having upstanding side flanges that project above said lapped portions on opposite sides thereof, said member being of greater width than the width of the sheet lap.

13. A car roof comprising roof sheets extending from caves to eaves and having their adjacentside marginal portions offset up-.

. Ward1y, the upwardly offset side marginal portions oil adjacent sheets being lapped for a portion'of their widthand positively secured together to forinhollow upstanding seams that extend from eaves to eaves of the car and gradually decrease in depth from ridge to eaves, Where they are't-urned down, the lapped portions of acentsheets being ofl'set downwardly on opposite sides of the ridge to form channelsinsaid seams that extend longitudinally thereof, and a member located in" said seam and extending longitudinally thereof fronrside to side of the car, said member being positively secured to and gradually increase in depth from-ridge flanges at its side margins Whose outer por- V tions are depressed downwardly on each side of the ridge portion of said sheet an amount that gradually increases towards-the eaves portions of said sheet.

roof sheet, said roof sheet having raised flanges at its side margins Whose outer portions are depressed downwardly on each side of the ridge oortion of said sheet an amount that gradual ly increases towards the eaves portions of said sheet, Where the downwardly offset portion lies substantially in the plane ofthe body of the sheet..

Signed at New Kensington, Pennsylvania, this 26th day of April, 1924. I V CHARLES DAVID BONSALL. Y

, V '30 15. As an, article of manufacture, a car 

